Inductance element and method for manufacturing inductance element

Abstract

The present application provides an inductance element and a method for manufacturing the inductance element. The inductance element mainly includes a magnet, terminals, and an inductance coil. Among them, a magnet core is provided in the magnet, and the inductance coil is wound around the magnet core. Two terminals are provided, and the two terminals are provided on both sides of the magnet facing each other. Two welding joint lead wires extend out of the magnet from the inductance coil, and the two welding joint lead wires correspond one-to-one to the two terminals, and the welding joint lead wires are welded to the terminals.

Description

Technical Field

[0001] This application claims the priority of a Chinese patent application with an application number of 202210756926.8, filed with the Chinese Patent Office on June 29, 2022, and all the contents of the above application are incorporated herein by reference.

[0002] This application relates to the technical field of inductance, for example, to an inductance element and a method for manufacturing an inductance element.

Background Art

[0003] An inductance element is one of the basic elements that make up an electronic circuit and is widely applied in electronic circuits by people. In an AC circuit, since the inductance element has the function of "allowing DC to pass through and blocking AC", it can play the roles of current interruption, voltage reduction, bridging coupling, and load in an AC circuit. Therefore, inductance elements are widely applied in industries such as automobiles, household appliances, and the Internet.

[0004] Currently, all inductance elements adopt an inductance wire and wind it according to the product needs with a certain inner diameter and number of turns to form an inductance coil. Then, after welding the inductance coil to the terminal inside the magnet, the external terminal is bent to the bottom of the magnet to achieve current conduction. In the design method of the inductance element in the related art, since the welding point is provided inside the magnet, it is easy to cause the phenomenon of short circuit between the welding point and the inductance coil. On the other hand, the designed size of the outer diameter of the inductance coil is restricted, and furthermore, the inductance amount of the inductance element decreases, affecting the product performance.

Summary of the Invention

[0005] In a first aspect, this application provides a magnet provided therein with a magnet middle column around which an inductance coil is wound, and There are two terminals provided, and the two are provided on both sides of the magnet facing each other. Two welding joint lead wires extend outside the magnet from the inductance coil, and the two welding joint lead wires correspond one-to-one to the two terminals, and each welding joint lead wire is welded to the corresponding terminal, providing an inductance element.

[0006] In a second aspect, the present application is used for processing and manufacturing the inductance element in the above embodiments, adopting an adhesive to coat alloy powder and granulating to form a powder material, adopting a copper wire to wind around an inductance coil, the shape of the copper wire being one of a round wire or a flat wire, and the coil center post being one of a circular shape, an elliptical shape, or a racetrack shape, welding two welding joint lead wires extending from the inductance coil to the terminals by spot welding or laser welding, placing the inductance coil after welding into a molding die, adding the powder material and press molding to form a magnet wrapping the inductance coil, heating and curing and baking the magnet after molding to provide strength to the magnet, bending the bent portion of the terminal toward the lower end surface of the magnet, and after the bent portion is bent, it abuts against the lower end surface of the magnet to form an electrode used for patching of the inductance element, providing a manufacturing method of the inductance element.

Brief Description of the Drawings

[0007]

Figure 1

Figure 2

Figure 3

Best Mode for Carrying Out the Invention

[0008] In the description of the present application, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated, a mechanical connection, an electrical connection, directly connected, or indirectly connected through an intermediate medium, or it may be a relationship of communication inside two elements or interaction between two elements. Those skilled in the art can understand the specific meaning of the above terms in the present application according to the specific situation.

[0009] In the present application, unless otherwise clearly defined and limited, the fact that the first feature is "above" or "below" the second feature may include that the first feature is in direct contact with the second feature, or may include that the first feature and the second feature are not in direct contact and are in contact through other features therebetween. Further, the fact that the first feature is "above", "upward" and "upper surface" of the second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the horizontal height of the first feature is higher than that of the second feature. The fact that the first feature is "below", "downward" and "lower surface" of the second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the horizontal height of the first feature is smaller than that of the second feature.

[0010] In the description of this embodiment, the orientation or positional relationship terms such as "upper", "lower", "left", and "right" are based on the orientation or positional relationship shown in the drawings, and are merely for facilitating the description and simplifying the operation, and do not indicate or imply that such a device or element must have a specific orientation and be configured and operated in a specific orientation, so it cannot be understood as limiting the present application. Also, the features limited by "first" and "second" can explicitly or implicitly include one or more of such features, and are for distinguishing and describing the features regardless of the order or importance. In the description of the present application, unless otherwise described, "a plurality" means two or more.

[0011] The embodiment of the present application provides an inductance element that has a simple structure, can prevent the occurrence of a short - circuit phenomenon between a welding point and an inductance coil, can increase the outer - diameter size of the inductance coil, and can improve the electrical performance of the inductance element.

[0012] Embodiment 1 As shown in FIG. 1, this embodiment mainly provides an inductance element including a magnet 100, terminals 300, and an inductance coil 200. Among them, a magnet center post 110 is provided in the magnet 100, and the inductance coil 200 is wound around the magnet center post 110. Two terminals 300 are provided, and the two terminals 300 are provided on both sides of the magnet 100 facing each other. Two welding - joint lead wires 210 extend out of the magnet 100 from the inductance coil 200, and the two welding - joint lead wires 210 correspond one - to - one to the two terminals 300, and the welding - joint lead wires 210 are welded to the terminals 300.

[0013] Based on the above design, the inductance coil 200 in this embodiment is wound using a copper wire. The shape of the copper wire is one of a round wire or a flat wire, and the coil core is one of a circular shape, an elliptical shape, or a racetrack shape. Different shapes of copper wires and magnet cores 110 can be selected according to actual needs, and this embodiment does not limit this. When processing and manufacturing the inductance element, first wind the copper wire around the inductance coil 200, then draw out two welded joint lead wires 210, and weld the two welded joint lead wires 210 to the two terminals 300 respectively by spot welding or laser welding. Then, put the terminals 300 and the inductance coil 200 into a mold, pour a magnetic powder material into the mold and press-mold to form a magnet 100 that wraps the inductance coil 200. In order to avoid the part of the welded joint lead wire 210 welded to the terminal 300 being covered by the magnet 100 wrapping the welded joint lead wire 210, it is necessary to expose it outside the mold. Then, cure the magnet 100 by firing to make the magnet 100 have a certain strength.

[0014] In one example, the terminal 300 in this embodiment is made of a copper material, and the surface of the copper material is coated with a metal tin layer. The terminal 300 may be made of other metal materials according to actual needs, such as metal iron, metal aluminum, or other alloy metals. This embodiment does not explain them individually here.

[0015] In one example, the terminal 300 of this embodiment is provided on the side wall of the magnet 100 facing it. The position of the terminal 300 may be flexibly set according to the shape of the magnet 100, such as a pentagon, a hexagon, or an irregular shape. The terminal 300 may be provided on two adjacent or non-adjacent side walls of the magnet 100. As long as the design scheme of the terminal 300 can ensure that the welding location of the welded joint lead wire 210 is drawn out outside the magnet 100, all belong to the protection scope of this application, and this embodiment does not limit this.

[0016] Compared with related technologies, the inductance element according to this embodiment has a simple structure. By pulling out the welded joint lead wire 210 to the outside of the magnet 100 and welding it to the terminal 300 outside the magnet 100 in this way, the situation where the welded joint lead wire 210 in the related technology occupies the internal space of the magnet 100 due to being inside the magnet 100 is avoided. Thereby, inside the magnet 100 with the same volume, by increasing the outer diameter of the inductance coil 200, the inductance amount of the inductance element is increased, and the electrical performance of the inductance element is enhanced. At the same time, due to the external arrangement of the welded joint lead wire 210, the risk that the inductance coil 200 contacts the welded joint lead wire 210 during operation and causes a short circuit can be avoided, and the safety performance of the inductance element can be enhanced.

[0017] As shown in FIG. 1, in this embodiment, the terminal 300 includes a pin portion 310 and a connection portion 320 integrally formed with the pin portion 310. After the pin portion 310 is bent, it is inserted into the magnet 100, and the connection portion 320 is provided by being attached to the side wall of the magnet 100. The welded joint lead wire 210 is welded to the connection portion 320. Preferably, each terminal 300 in this embodiment is provided with two pin portions 310, and a total of four pin portions 310 are provided for the two terminals 300. The pin portion 310 in FIG. 1 is not attached to the upper end surface of the magnet 100. During the process of processing and pouring the magnetic powder material, the pin portion 310 is inserted into the magnet 100. FIG. 1 is only a schematic diagram showing the relative positions of the pin portion 310 and the inductance coil 200.

[0018] In one example, the terminal 300 in this embodiment is provided at one end of the connection portion 320 away from the pin portion 310 and includes a bent portion (not shown) integrally formed with the connection portion 320. After being bent, the bent portion abuts against the lower end surface of the magnet 100, and by forming an electrode used for patching the inductance element, the connection between the inductance element and the circuit board is facilitated.

[0019] Exemplarily, in this embodiment, each terminal 300 has one bent portion extending therefrom, and the bent portion is placed outside the mold during the process of processing and pouring the magnetic powder material. Therefore, it is advantageous to form the electrode by bending the bent portion toward the lower end surface of the magnet 100 in subsequent processes, and it facilitates subsequent patching of the electrode. Further, in this embodiment, the sum of the widths of the two bent portions is smaller than the side length of the magnet 100. Thus, the phenomenon that the two electrodes are connected to each other and cause a short-circuit failure is avoided.

[0020] As shown in FIG. 1, the upper end surface of the magnet 100 in this embodiment is square, the side length of the square is C1, the shortest distance from the pin portion 310 of the outer diameter of the inductance coil 200 is C2, and C1 and C2 satisfy the relational expression 9.0 ≦ C1 / C2 ≦ 10.0. Exemplarily, in this embodiment, the designed outer diameter R1 of the inductance coil 200 is 5.8 mm, the side length C1 of the magnet 100 is 7.8 mm, and the shortest distance C2 from the pin portion 310 of the outer diameter of the inductance coil 200 is 0.85 mm. Under the same conditions, C2 in the related art can only be set to 0.39 mm, and C2 in this embodiment is 0.46 mm larger than that in the related art. The height of the magnet 100 is 5.2 mm, the height of the inductance coil 200 is 0.35 * 9 = 3.15 mm, and the diameter R2 of the magnet middle column 110 is 3 mm. When the inductance element in this embodiment is applied to the design of a high-inductance inductor, the risk of failure of the high-inductance waveform can be significantly reduced. When the inductance element in this embodiment is applied to the design of a low-inductance inductor for consumer products, without changing the distance between the inductance coil 200 and the terminal 300, expanding the inner diameter of the magnet middle column 110 can be satisfied, and the overall inductor characteristics can be improved.

[0021] In one embodiment, the magnet core 110 may be part of the magnet 100. The magnet core 110 may be provided separately, or may be directly pressed during molding to form the magnet 100 including the magnet core 110.

[0022] This embodiment further provides a method for manufacturing an inductance element for processing and manufacturing the inductance element in the above embodiments. The method for manufacturing the inductance element includes the following steps.

[0023] In the preparation of the powder material, an adhesive is employed to coat and granulate alloy powder to form the powder material.

[0024] Exemplarily, the alloy powder is a non-rustproof magnetic material, and the step of preparing the powder material includes performing a coating insulation treatment on the non-rustproof magnetic material. Alloy powder of a rustproof magnetic material may be employed, and by doing so, it becomes unnecessary to perform a coating insulation treatment on the alloy powder, and the processing and manufacturing process is improved. Further, the powder material may also be in a form in which one type such as carbonyl iron powder, amorphous powder, nanocrystalline powder, etc. is added or a plurality of types are combined. The magnetic permeability of the powder material is controlled between 10 and 60, and the mesh number of the powder material granulated using an adhesive is between 60 mesh and 300 mesh. However, in order to enhance the fluidity of the powder material, it is necessary to ensure that the proportion of the number of particles below 300 mesh is lower than 10%.

[0025] In the preparation of the inductance coil 200, a copper wire is employed to wind around the inductance coil 200. The shape of the copper wire is one of a round wire or a flat wire, the coil core is one of a circular shape, an elliptical shape, and a racetrack shape, and the outer diameter of the inductance coil 200 is C1.

[0026] In welding, two welded joint lead wires 210 extending from the inductance coil 200 are welded to the terminal 300 by spot welding or laser welding. For example, the welded joint lead wire 210 is welded to the connection portion 320 of the terminal 300.

[0027] In forming, after welding, the inductance coil 200 is placed into a forming die, powder material is added and press-formed to form the magnet 100 that wraps the inductance coil 200.

[0028] For example, when placing the inductance coil 200 into the forming die, it is necessary to ensure that the welding position between the welded joint lead wire 210 and the connection part 320 is placed outside the die. Further, it is necessary to ensure that an inductance coil 200 with a larger outer diameter size can be accommodated inside the magnet 100 in a limited volume of space.

[0029] In baking, the formed magnet 100 is heated and cured by baking to endow the magnet 100 with a certain strength, and further extend the service life of the magnet 100. The operator can flexibly set the baking time and temperature according to the actual situation. For example, the baking time is 30 minutes to 60 minutes, and the baking temperature is between 200 degrees Celsius and 500 degrees Celsius. This embodiment does not limit this.

[0030] In bending, the bent part of the terminal 300 is bent towards the lower end surface of the magnet 100. After the bent part is bent, it abuts against the lower end surface of the magnet 100, and by forming an electrode used for patching of the inductance element, the connection between the inductance element and the circuit board is facilitated.

[0031] The manufacturing method of the inductance element of this embodiment can not only manufacture an inductor size of 8mm * 8mm, but is also applicable to the manufacture of inductance elements in a size series of 2mm * 2mm to 32mm * 32mm. Exemplarily, the manufacturing method of the inductance element can manufacture inductance elements with sizes such as 2mm * 2mm, 5mm * 5mm, 10mm * 10mm, 32mm * 32mm, etc. This embodiment does not explain this individually.

[0032] The manufacturing method of the inductor element of this embodiment has simple steps, easy processing operations, can manufacture an inductor element with a high inductance value by processing, improve the electrical performance of the inductor element, and can save costs.

[0033] Example 2 As shown in FIG. 2, this embodiment provides an inductor element. The main difference from Example 1 is that a chamfer is provided at one end of the pin portion 310 of this embodiment close to the inductor coil 200. The upper end surface of the magnet 100 is square, the side length of the square is C1, the shortest distance from the chamfer of the outer diameter of the inductor coil 200 is C3, and C1 and C3 are distinguished by satisfying the relational expression 8.0 ≤ C1 / C3 ≤ 9.0. A decrease in the value of the ratio of C1 / C3 means that, for the magnet 100 of the same volume, the distance between the inductor coil 200 and the pin portion 310 becomes larger, further increasing the inductance value of the inductor element and improving the product performance. Exemplarily, the designed outer diameter R1 of the inductor coil 200 in this embodiment is 5.8 mm, the side length C1 of the magnet 100 is 7.8 mm, the shortest distance C2 from the outer diameter of the inductor coil 200 to the pin portion 310 is 1.05 mm. Under the same conditions, C2 in the related art can only be set to 0.39 mm, and C2 in this embodiment is 0.66 mm larger than that in the related art. The height of the magnet 100 is 5.2 mm, the height of the inductor coil 200 is 0.35 * 9 = 3.15 mm, and the diameter R2 of the magnet middle column 110 is 3 mm.

[0034] Other structures of this embodiment are all the same as those in Example 1 and will not be described individually here.

[0035] This embodiment further provides a manufacturing method of an inductor element for manufacturing the inductor element in the above embodiments. The manufacturing method of the inductor element includes the following steps.

[0036] In the preparation of the powder material, an adhesive is adopted to coat and granulate the alloy powder to form the powder material.

[0037] Exemplarily, the alloy powder is a non-rust-proof magnetic material, and the step of preparing the powder material includes performing a coating insulation treatment on the non-rust-proof magnetic material. An alloy powder of a rust-proof magnetic material may also be adopted, and in this way, there is no need to perform a coating insulation treatment on the alloy powder, and the processing and manufacturing process is improved. Further, the powder material may also be in a form in which one type such as carbonyl iron powder, amorphous powder, nanocrystalline powder, etc. is added or a plurality of types are combined. The magnetic permeability of the powder material is controlled between 10 and 60, and the mesh number of the powder material granulated using an adhesive is between 60 mesh and 300 mesh. However, in order to enhance the fluidity of the powder material, it is necessary to ensure that the proportion of the number of particles below 300 mesh is lower than 10%.

[0038] In the preparation of the inductance coil 200, a copper wire is adopted to wind around the inductance coil 200. The shape of the copper wire is one of a round wire or a flat wire. The coil middle column is one of a circular shape, an elliptical shape, and a racetrack shape. The outer diameter of the inductance coil 200 is C1.

[0039] In welding, two welded joint lead wires 210 extending from the inductance coil 200 are welded to the terminal 300 by spot welding or laser welding. For example, the welded joint lead wire 210 is welded to the connection part 320 of the terminal 300.

[0040] In forming, the inductance coil 200 after welding is placed into a forming mold, the powder material is added and press-formed to form a magnet 100 wrapping the inductance coil 200.

[0041] For example, when placing the inductance coil 200 into the molding die, it is necessary to ensure that the welding position between the welded joint lead wire 210 and the connection part 320 is placed outside the die, and further ensure that an inductance coil 200 with a larger outer diameter size can be accommodated inside the magnet 100 in a limited volume of space.

[0042] In firing, the magnet 100 after molding is heated and cured by firing to endow the magnet 100 with a certain strength and further extend the service life of the magnet 100. The operator can flexibly set the firing time and temperature according to the actual situation. For example, the firing time is 30 minutes to 60 minutes, and the firing temperature is between 200 degrees Celsius and 500 degrees Celsius. This embodiment does not limit this.

[0043] In bending, the bent part of the terminal 300 is bent towards the lower end surface of the magnet 100. After the bent part is bent, it abuts against the lower end surface of the magnet 100, and by forming an electrode used for patching of the inductance element, the connection between the inductance element and the circuit board is facilitated.

[0044] The manufacturing method of the inductance element of this embodiment can not only manufacture an inductance size of 8mm * 8mm, but is also applicable to the manufacture of inductance elements in a size series of 2mm * 2mm to 32mm * 32mm. Exemplarily, the manufacturing method of the inductance element can manufacture inductance elements with sizes such as 2mm * 2mm, 5mm * 5mm, 10mm * 10mm, 32mm * 32mm, etc. This embodiment does not explain this individually.

[0045] The manufacturing method of the inductance element of this embodiment has simple steps, easy processing operations, can process and manufacture inductance elements with a high inductance amount, improve the electrical performance of the inductance elements, and can save costs.

[0046] Example 3 As shown in FIG. 3, this embodiment provides an inductance element, which is mainly distinguished from Embodiment 2 in that a perforation 3101 is provided in the pin portion 310 of this embodiment. For example, perforations 3101 are provided in all four pin portions 310 of the two terminals 300. By providing the perforations 3101, in the process of forming the magnet 100, by passing the powder material through the perforations 3101, after the magnet 100 is cured and sintered, the grip force and bonding force between the terminal 300 and the magnet 100 can be increased, and further the certainty and stability of the terminal 300 can be enhanced.

[0047] Exemplarily, the perforation 3101 in this embodiment can be set as a circular hole, a square hole, an elliptical hole or an irregular hole, and the number of perforations 3101 in each pin portion 310 can be single or plural, and can be set to numerical values such as 1, 2, 3, etc. This embodiment does not limit this.

[0048] Exemplarily, the upper end surface of the magnet 100 is square, the side length of the square is C1, the shortest distance from the chamfer of the outer diameter of the inductance coil 200 is C3, and C1 and C3 satisfy the relational expression 8.0 ≦ C1 / C3 ≦ 9.0. A decrease in the value of the ratio C1 / C3 means that, in the magnet 100 of the same volume, the distance between the inductance coil 200 and the pin portion 310 becomes larger, further increasing the inductance amount of the inductance element and improving the product performance. Exemplarily, the designed outer diameter R1 of the inductance coil 200 in this embodiment is 5.8 mm, the side length C1 of the magnet 100 is 7.8 mm, and the shortest distance C2 from the outer diameter of the inductance coil 200 to the pin portion 310 is 1.05 mm. Under the same conditions, C2 in the related art can only be set to 0.39 mm, and C2 in this embodiment is 0.66 mm larger than that in the related art. The height of the magnet 100 is 5.2 mm, the height of the inductance coil 200 is 0.35 * 9 = 3.15 mm, and the diameter R2 of the magnet middle column 110 is 3 mm.

[0049] The other structures of this embodiment are all the same as those of Embodiment 2 and will not be described individually here.

[0050] This embodiment further provides a method for manufacturing an inductance element for processing and manufacturing the inductance element in the above embodiments. The method for manufacturing the inductance element includes the following steps.

[0051] In the preparation of the powder material, an adhesive is adopted to coat and granulate the alloy powder to form a powder material.

[0052] Exemplarily, the alloy powder is a non-rust-proof magnetic material, and the step of preparing the powder material includes performing a coating insulation treatment on the non-rust-proof magnetic material. Of course, the operator may also adopt an alloy powder of a rust-proof magnetic material. By doing so, it is not necessary to perform a coating insulation treatment on the alloy powder, and the processing and manufacturing process is improved. Further, the powder material may also be in a form in which one type such as carbonyl iron powder, amorphous powder, nano-crystalline powder, etc. is added or a plurality of types are combined. The magnetic permeability of the powder material is controlled between 10 and 60, and the mesh number of the powder material granulated using an adhesive is between 60 mesh and 300 mesh. However, in order to improve the fluidity of the powder material, it is necessary to ensure that the proportion of the number of particles below 300 mesh is lower than 10%.

[0053] In the preparation of the inductance coil 200, a copper wire is adopted to wind around the inductance coil 200. The shape of the copper wire is one of a round wire or a flat wire, the coil middle column is one of a circular shape, an elliptical shape, and a racetrack shape, and the outer diameter of the inductance coil 200 is C1.

[0054] In welding, two welding joint lead wires 210 extending from the inductance coil 200 are welded to the terminal 300 by spot welding or laser welding. For example, the welding joint lead wire 210 is welded to the connection portion 320 of the terminal 300.

[0055] In the forming process, the inductance coil 200 after welding is placed in a forming die, powder material is added and press-formed to form a magnet 100 that wraps the inductance coil 200.

[0056] For example, when placing the inductance coil 200 in the forming die, it is necessary to ensure that the welding position between the welded joint lead wire 210 and the connection part 320 is placed outside the die. Furthermore, it is necessary to ensure that an inductance coil 200 with a larger outer diameter size can be accommodated inside the magnet 100 in a limited volume of space.

[0057] In the baking process, the formed magnet 100 is heated and cured by baking to endow the magnet 100 with a certain strength and further extend the service life of the magnet 100. The operator can flexibly set the baking time and temperature according to the actual situation. For example, the baking time is 30 minutes to 60 minutes, and the baking temperature is between 200 degrees Celsius and 500 degrees Celsius. This embodiment does not limit this.

[0058] In the bending process, the bending part of the terminal 300 is bent towards the lower end surface of the magnet 100. After the bending part is bent, it abuts against the lower end surface of the magnet 100, and an electrode used for patching of the inductance element is formed, thereby facilitating the connection between the inductance element and the circuit board.

[0059] The manufacturing method of the inductance element in this embodiment can not only manufacture an inductance size of 8mm * 8mm, but is also applicable to the manufacture of inductance elements in the size series of 2mm * 2mm to 32mm * 32mm. Exemplarily, the manufacturing method of the inductance element can manufacture inductance elements with sizes such as 2mm * 2mm, 5mm * 5mm, 10mm * 10mm, 32mm * 32mm, etc. This embodiment does not explain this individually.

[0060] The manufacturing method of the inductance element of this embodiment has simple steps, easy processing operations, can process and manufacture an inductance element with a high inductance amount, improve the electrical performance of the inductance element, and can save costs.

[0061] From the above, through the electrical performance test on the inductance elements according to the above three embodiments, the following test results can be obtained by testing.

Table 1

Table 2

[0062] A person skilled in the art should understand that this application is not limited to the specific embodiments here, and various changes, readjustments and substitutions can be made by a person skilled in the art without departing from the protection scope of this application. Therefore, although this application has been described by the above embodiments, this application is not limited to only the above embodiments, and may further include more other equivalent embodiments without departing from the concept of the present invention. The scope of this application is determined by the appended claims.

[0063] In the description of this specification, the descriptions of reference terms such as "some embodiments" and "other embodiments" mean that the specific features, structures, materials or features described in connection with the embodiments or examples are included in at least one embodiment or example of this application. In this specification, the schematic expressions for the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or features described may be combined in any one or more embodiments or examples in an appropriate manner. A person skilled in the art should understand that there are changes in both the specific embodiments and the application scope according to the idea of this application, and the content of this specification should not be understood as limiting this application.

Explanation of Signs

[0064] 100 Magnet 110 Magnet Core 200 Inductance Coil 210 Welded Joint Lead Wire 300 Terminal 310 Pin Part 3101 Perforation 320 Connection Part

Claims

1. A magnet (100) having a magnetic middle column (110) around which an inductance coil (200) is wound, and two terminals (300) provided on both sides of the magnet (100) facing each other, comprising: two welding joint lead wires (210) extend outside the magnet (100) from the inductance coil (200), and the two welding joint lead wires (210) correspond one-to-one to the two terminals (300), and each welding joint lead wire (210) is welded to the corresponding terminal (300), An inductance element.

2. Each terminal (300) includes a pin portion (310) and a connection portion (320) integrally formed with the pin portion (310). The pin portion (310) is inserted into the magnet (100), and the connection portion (320) is provided by being attached to the side wall of the magnet (100). The inductance element according to claim 1.

3. Each welding joint lead wire (210) is welded to the corresponding connection portion (320). The inductance element according to claim 2.

4. Each welding joint lead wire (210) is welded and connected to the corresponding connection portion (320) by spot welding or laser welding. The inductance element according to claim 3.

5. Each terminal (300) is provided at one end of the connection portion (320) away from the pin portion (310), integrally formed with the connection portion (320), and includes a bent portion that abuts against the lower end surface of the magnet (100) after being bent to form an electrode. The inductance element according to claim 2.

6. The upper end surface of the magnet (100) is square, the length of the side of the square is C1, the shortest distance from the outer diameter of the inductance coil (200) to the pin portion (310) is C2, and C1 and C2 satisfy the relational expression 9.0 ≤ C1 / C2 ≤ 10.

0. The inductance element according to claim 2.

7. A chamfer is provided at one end of each pin portion (310) close to the inductance coil (200). The upper end surface of the magnet (100) is square, the length of the side of the square is C1, the shortest distance from the outer diameter of the inductance coil (200) to the chamfer is C3, and C1 and C3 satisfy the relational expression 8.0 ≤ C1 / C3 ≤ 9.

0. The inductance element according to claim 2.

8. Each pin portion (310) is provided with a perforation (3101). The inductance element according to any one of claims 2, 6, or 7.

9. Used for manufacturing by processing the inductance element according to any one of claims 1 to 8, Adopting an adhesive to coat alloy powder and granulating to form a powder material, Adopting a copper wire and winding it around the inductance coil (200), wherein the shape of the copper wire is one of a round wire or a flat wire, and the coil central column is one of a circular shape, an elliptical shape, or a racetrack shape, Welding two welded joint lead wires (210) extending from the inductance coil (200) to the terminal (300) by spot welding or laser welding, Placing the inductance coil (200) after welding into a forming mold, adding the powder material and performing press forming to form a magnet (100) wrapping the inductance coil (200), Heating and curing and firing the formed magnet (100) to endow the magnet (100) with strength, Bending the bent portion of the terminal (300) towards the lower end surface of the magnet (100), and after the bent portion is bent, making it abut against the lower end surface of the magnet (100) to form an electrode used for patching of the inductance element, including A method for manufacturing an inductance element.

10. The alloy powder is a magnetic material. Adopting the adhesive to coat alloy powder and granulating to form a powder material includes performing a coating rust prevention treatment on the non-rust-proof magnetic material and not performing a coating rust prevention treatment on the rust-proof magnetic material. The method for manufacturing an inductance element according to claim 9.

Images